"Frikadels" as you call them, are a German thing. I used to get them ALLLLLLLL the time in Deutschland. They are awesome. Kind of the German version of an American Hamburger. No sauce on these, though.
Ground pork, chop onions really tiny, salt & pepper, egg plain bread crumbs. Mix it all together, make into burgers. Fry until cooked really well. Have it on a roll with mustard.
Aaaah. I think I will be having one when I come back to Europe. Sigh.